We are using a Newhaven NHD-7.0-800480EF-ASXN#-CTP display with a Colibri iMX6. Everything works great except that I can’t get the LCD backlight to turn off by using the Power applet in the control panel.
It looks like we are doing everything correctly according to this post:
Specifically, from the Iris carrier connector X3, pin 5 (BL_ON) is connected to pin 31 (DISP) of the Newhaven display. X3 pin 5 is SODIMM # 71, which is the default backlight enable pin according to that post.
I have set the power properties as suggested:
The only thing that may be missing are registry settings. That post I referred to says this:
By default we use SODIMM Pin no. 71 as
backlight enable pin. You can change
this pin and its polarity as per your
hardware configuration through below
display driver registry entry :
“BL_GPIO”=dword: x (where x = GPIO No.
of SODIMM Pin you want to use)
“BL_POL”=dword:0 or 1
“DISP_POL”=dword:0 or 1
I have not added any of this information to the registry, as I understand that the default should be sufficient. Are these registry settings needed if we just use the defaults?
If you have any ideas what we should try to resolve this, it would be very much appreciated.